Simulation of Chatter Vibrations for Wiper Systems

Abstract

<div class="htmlview paragraph">An experimental investigation is first carried out to analyze the influence of the geometrical configuration of a wiper system on the chattering occurrence. The measurement results show a combined influence of the load applied on the rubber blade and the attack angle on the vibratory level of the blade. A mathematical four-degree of freedom model, based on the Sprag-slip theory, is developed to simulate the behavior of the rubber blade during the wiping motion. A dynamic analysis is then performed to define conditions for stable motion of the system. The comparison of these theoretical unstable configurations and the experimental chattering cases shows good correlation.</div> <div class="htmlview paragraph">This theoretical survey points out necessary conditions for unstable motion, in terms of orientation of the rubber blade to the glass surface. Moreover, a two-parameter study on the stiffness of the mathematical model highlights the influence of the geometry of the rubber blade cross-section and the material properties on the instability results.</div>